[main] Update dependencies from devdiv/DevDiv/vs-code-coverage (#15733)

* Update dependencies from https://dev.azure.com/devdiv/DevDiv/_git/vs-code-coverage build 20260429.1
On relative base path root
Microsoft.Internal.CodeCoverage From Version 18.7.0-preview.26223.1 -> To Version 18.8.0-preview.26229.1

* Update dependencies from https://dev.azure.com/devdiv/DevDiv/_git/vs-code-coverage build 20260506.1
On relative base path root
Microsoft.Internal.CodeCoverage From Version 18.7.0-preview.26223.1 -> To Version 18.8.0-preview.26256.1

---------

Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

Author: dotnet-maestro[bot]

eng/Version.Details.props

@@ -18,7 +18,7 @@ This file should be imported by eng/Versions.props
     <MicrosoftDiaSymReaderConverterPackageVersion>1.1.0-beta2-19575-01</MicrosoftDiaSymReaderConverterPackageVersion>
     <MicrosoftDiaSymReaderPdb2PdbPackageVersion>1.1.0-beta2-19575-01</MicrosoftDiaSymReaderPdb2PdbPackageVersion>
     <!-- vs-code-coverage dependencies -->
-    <MicrosoftInternalCodeCoveragePackageVersion>18.7.0-preview.26223.1</MicrosoftInternalCodeCoveragePackageVersion>
+    <MicrosoftInternalCodeCoveragePackageVersion>18.8.0-preview.26256.1</MicrosoftInternalCodeCoveragePackageVersion>
   </PropertyGroup>
   <!--Property group for alternate package version names-->
   <PropertyGroup>

eng/Version.Details.xml

@@ -2,9 +2,9 @@
 <Dependencies>
   <Source Uri="https://github.com/dotnet/dotnet" Mapping="vstest" Sha="3c45e4f3e8b0e9069e8b740c7cfa610075c8ca34" BarId="312822" />
   <ProductDependencies>
-    <Dependency Name="Microsoft.Internal.CodeCoverage" Version="18.7.0-preview.26223.1">
+    <Dependency Name="Microsoft.Internal.CodeCoverage" Version="18.8.0-preview.26256.1">
       <Uri>https://dev.azure.com/devdiv/DevDiv/_git/vs-code-coverage</Uri>
-      <Sha>e8a74b66b49be69b94cbc5fd5044146b7ed88490</Sha>
+      <Sha>ebdd853aa2bf4796e26f36f829739fbc5ad3c001</Sha>
     </Dependency>
     <Dependency Name="Microsoft.Diagnostics.NETCore.Client" Version="0.2.0-preview.26251.112">
       <Uri>https://github.com/dotnet/dotnet</Uri>